Delving here in an area, I usually leave to chance, when crossing liliums, but feel this may be beneficial knowledge.In the Dec 2012 issue of 'The Trumpeter',2 pages of notes, by the late Joe Hoell, on Dominant and Recessive Traits in Liliums and their role in Practical Hybridising: A quick run down:
Red is dominant to yellow or white
Tall stems are dominant to dwarf stems
Side facing or pendant flowers are dominant to up facing flowers
Epigeal germination is dominant to Hypogeal germination
Seed from trumpet crosses always germinates epigeally, even if crossed to orientals..
As I say, 2 pages with examples /names and many blunt statements[way too much for me to type]-Anthony
